feat: Cuttlefish highlighter

[SignalWhisperer]

Issue #, if available:
N/A

Description of changes:
Added a highlighter for the Cuttlefish format, used in Erlang applications.

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[codecov]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (1e6fcf3) 87.24% compared to head (1845911) 87.25%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #5278   +/-   ##
=======================================
  Coverage   87.24%   87.25%           
=======================================
  Files         565      567    +2     
  Lines       45330    45351   +21     
  Branches     6934     6934           
=======================================
+ Hits        39548    39569   +21     
  Misses       5782     5782           

Flag	Coverage Δ
unittests	87.25% <100.00%> (+<0.01%)	⬆️

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Files Changed	Coverage Δ
src/mode/cuttlefish.js	100.00% <100.00%> (ø)
src/mode/cuttlefish_highlight_rules.js	100.00% <100.00%> (ø)

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[akoreman]

Thanks for your contribution.